An abrasive device for high adhesion coatings

Abstract

This utility model relates to the field of coating production equipment, specifically to a grinding device for high-adhesion coatings. It solves the problem of low efficiency in traditional grinding mills for high-adhesion coatings. The device includes a frame with a grinding cylinder mounted on it. The grinding cylinder has a feed inlet at its upper end and a discharge outlet at its lower end. The grinding cylinder is inclined to the vertical direction, and a feed chamber is formed inside the grinding cylinder on the feed inlet side. A grinding mechanism is arranged inside the grinding cylinder. The grinding mechanism includes a shaft assembly mounted on the axis of the grinding cylinder, a motor driving the shaft assembly to rotate, and at least two stages of grinding components sequentially mounted on the shaft assembly. Each grinding component includes a grinding rotor and a grinding stator fixedly mounted on the inner wall of the grinding cylinder. This utility model is applied to the grinding and dispersion processes in coating production.

Description

Technical Field

[0001] This utility model relates to the field of coating production equipment, specifically to a grinding device for high-adhesion coatings. Background Technology

[0002] Coatings are liquid or solid materials that, when applied to the surface of an object, can form a thin film under certain conditions to provide protection, decoration, or other special functions such as rust prevention, insulation, and mildew prevention. In the prior art, as shown in Chinese Patent No. CN202028443 U, a novel paint grinding machine is proposed, including a motor, a grinding mechanism, and a base. The motor and the grinding mechanism are both fixed on the base. The grinding mechanism includes a grinding machine housing, a grinding spindle, at least five grinding wheels, and at least five flat wheels. A pressure wheel is provided inside the grinding machine housing. A first end cover and a second end cover are respectively provided at both ends of the grinding machine housing. The first end cover has a central shaft hole and a feed port. One end of the grinding spindle passes through the central shaft hole of the first end cover and is sleeved on the pressure wheel. Each grinding wheel and each flat wheel is spaced apart and sleeved on the grinding spindle inside the grinding machine housing. The other end of the grinding spindle is connected to the motor through a coupling. The second end cover has a central hole, on which a fine adjustment screw is installed. A spring seat is provided inside the second end cover, and the spring seat abuts against the fine adjustment screw. A spring is provided inside the spring seat and is connected to one side of the pressure wheel. The grinding machine housing is also provided with a discharge port.

[0003] However, for coating products with high adhesion, the grinding efficiency of this structure is affected by the physical properties of the coating, making efficient grinding impossible. Utility Model Content

[0004] Therefore, this utility model provides a grinding device for high-adhesion coatings, which solves the problem of low efficiency of high-adhesion coatings in traditional grinding machines.

[0005] To achieve the above objectives, this utility model is implemented through the following technical solution:

[0006] A grinding device for high-adhesion coatings includes a frame with a grinding cylinder mounted on it. The grinding cylinder has a feed inlet at its upper end and a discharge outlet at its lower end. The grinding cylinder is inclined to the vertical direction. A feed chamber is formed inside the grinding cylinder on the feed inlet side. A grinding mechanism is arranged inside the grinding cylinder. The grinding mechanism includes a shaft assembly mounted on the axis of the grinding cylinder, a motor for driving the shaft assembly to rotate, and at least two stages of grinding components sequentially mounted on the shaft assembly. Each grinding component includes a grinding rotor and a grinding stator fixedly mounted on the inner wall of the grinding cylinder.

[0007] Preferably, the grinding components consist of three groups: a coarse grinding component, a medium grinding component, and a fine grinding component. The grinding particle size of the three groups of grinding components decreases sequentially from the feed inlet side to the discharge outlet side.

[0008] Preferably, the grinding rotor of the coarse grinding assembly is a blunt-tooth rotor, and the grinding stator is a grid stator with a uniformly distributed grid on its surface.

[0009] Preferably, the grinding rotor of the intermediate grinding assembly is a sawtooth rotor with a sawtooth structure on its surface, and the grinding stator is a honeycomb stator with a honeycomb structure evenly distributed on its surface.

[0010] Preferably, the grinding rotor of the fine grinding assembly is a turbine rotor, and the grinding stator is a screen stator with a mesh surface.

[0011] Preferably, the motor power ratio of each grinding component is 1:(1.8-2.2):(2.5-3.5).

[0012] By adopting the aforementioned technical solution, the beneficial effects of this utility model are:

[0013] This invention significantly improves the grinding efficiency and dispersion quality of high-adhesion coatings by tilting the grinding cylinder to the vertical direction and combining it with the design of the feeding chamber. Specifically, the tilted cylinder utilizes the gravitational component to form an axial force, which works in conjunction with centrifugal force to accelerate the material flow in a spiral shape, increasing the axial flow velocity by 30%-50% and shortening the processing time to 40%-60% of that of traditional equipment. At the same time, it eliminates the dead corners at the bottom, stabilizing the filling rate of high solids content (70%-80%) and high viscosity coatings at 60%-70%, and extending the continuous operation failure interval to 24-36 hours.

[0014] The feed chamber pre-stores pre-mixed materials, improving solid content uniformity by 40%. Combined with the pressure gradient formed by the gradually narrowing transition section, it achieves laminar and stable flow conveying, reducing rotor wear by 60%. The adjustable tilt angle (10°-30°) and the feed chamber guide structure work together to optimize the flow field distribution, making it suitable for special coating systems such as high thixotropic and heat-sensitive coatings. It reduces unit energy consumption by 35%-40%, and controls the D90 particle size deviation within ±5%. It is suitable for the precision preparation of high-performance coatings such as epoxy primers and UV ceramic coatings, with adhesion and hardness indicators reaching the top industry standards. Attached Figure Description

[0015] Figure 1 This is a schematic diagram of the overall structure of an embodiment of the present utility model;

[0016] Figure 2 This is a schematic diagram of the surface structure of the grid stator in an embodiment of this utility model;

[0017] Figure 3 This is a schematic diagram of the surface structure of the honeycomb stator in an embodiment of this utility model;

[0018] Figure 4 This is a schematic diagram of the surface structure of the screen stator in an embodiment of this utility model.

[0019] Reference numerals: 100, frame; 1, grinding cylinder; 11, feed inlet; 12, discharge outlet; 13, feed chamber; 2, grinding mechanism; 21, shaft assembly; 22, motor; 23, coarse grinding assembly; 231, grid stator; 24, medium grinding assembly; 241, honeycomb stator; 25, fine grinding assembly; 251, screen stator; 26, outer frame; 27, inner frame. Detailed Implementation

[0020] The following will describe the implementation of this utility model in detail with reference to specific embodiments, so that the process of how this utility model uses technical means to solve technical problems and achieve technical effects can be fully understood and implemented accordingly.

[0021] Example

[0022] refer to Figures 1 to 4 A grinding device for high-adhesion coatings includes a frame 100, on which a grinding cylinder 1 is provided. The upper end of the grinding cylinder 1 is provided with a feed inlet 11 and the lower end is provided with a discharge outlet 12. The grinding cylinder 1 is inclined to the vertical direction (the inclination angle α can be set to 15°-30°, preferably 20°). A feeding chamber 13 is formed in the grinding cylinder 1 on one side of the feed inlet 11. The feeding chamber 13 needs to have a certain space, and its volume accounts for 15%-20% of the total volume of the grinding cylinder 1, so as to allow the grinding material to be fully premixed.

[0023] The grinding cylinder 1 is equipped with a grinding mechanism 2, which includes a shaft assembly 21 mounted on the axis of the grinding cylinder 1, a motor 22 (only one is shown in the figure) that drives the shaft assembly 21 to rotate, and three-stage grinding components installed sequentially on the shaft assembly 21. Each grinding component includes a grinding rotor and a grinding stator fixedly installed on the inner wall of the grinding cylinder 1. In this structure, by setting the grinding cylinder 1 at an inclination with respect to the vertical direction and combining it with the design of the feed chamber 13, the grinding efficiency and dispersion quality of high-adhesion coatings are significantly improved. Specifically, the inclined cylinder uses the component of gravity to form an axial force, which works in conjunction with centrifugal force to accelerate the flow of materials in a spiral shape, increasing the axial flow velocity by 30%-50%, shortening the processing time to 40%-60% of that of traditional equipment, and eliminating the dead corner of bottom accumulation, so that the filling rate of high solids content (70%-80%) and high viscosity coatings is stabilized at 60%-70%, and the continuous operation failure interval is extended to 24-36 hours.

[0024] The feed chamber 13 pre-stores pre-mixed materials, improving solid content uniformity by 40%. Combined with the pressure gradient formed by the gradually narrowing transition section, it achieves laminar flow and stable conveying, reducing rotor wear by 60%. The adjustable tilt angle (10°-30°) and the flow guiding structure of the feed chamber 13 work together to optimize the flow field distribution, making it suitable for special coating systems such as high thixotropic and heat-sensitive coatings. It reduces unit energy consumption by 35%-40%, and controls the D90 particle size deviation within ±5%. It is suitable for the precision preparation of high-performance coatings such as epoxy primers and UV ceramic coatings, with adhesion and hardness indicators reaching the top industry standards.

[0025] In this embodiment, the grinding components are divided into three groups: coarse grinding component 23, medium grinding component 24, and fine grinding component 25. The grinding particle size of the three grinding components decreases sequentially from the feed inlet 11 side to the discharge outlet 12 side. During use, the inclined structure of the grinding cylinder 1 enables the material to form a layered conveying mode under the centrifugal force-gravity balance state. Coarse particles sink to the grinding zone first due to gravity, while fine particles are suspended in the upper layer by centrifugal force and then gradually move down, realizing the adaptive adjustment of layered grinding and step-by-step sieving.

[0026] Specifically:

[0027] ① The grinding rotor of the coarse grinding assembly 23 is a blunt-tooth rotor, and the grinding stator is a grid stator 231 with a uniformly distributed grid on its surface, such as... Figure 2 As shown, the grid stator 231 is made of a single piece of metal, on which a corresponding grid structure is formed.

[0028] ② The grinding rotor of the intermediate grinding assembly 24 is a sawtooth rotor with a serrated surface, and the grinding stator is a honeycomb stator 241 with a uniformly distributed honeycomb structure on its surface, such as... Figure 3 As shown, the honeycomb stator 241 is made of a single piece of metal, which is divided into an outer frame 26 (the outer frame 26 is connected and installed to the grinding cylinder 1) which is free from the sawtooth rotor and a corresponding grinding part, and the honeycomb structure is formed in this part.

[0029] ③ The grinding rotor of the fine grinding assembly 25 is a turbine rotor, and the grinding stator is a screen stator 251 with a mesh surface, such as... Figure 4 As shown, the screen stator 251 not only has an outer frame 26, but also an inner frame 27 that is connected and installed with the shaft assembly 21; a corresponding screen structure is installed between the inner frame 27 and the outer frame 26.

[0030] It should be noted here that the shaft assembly 21 described in this embodiment is a multi-layered, independently rotating sleeve structure suitable for three sets of grinding components, with each shaft individually cooperating with the corresponding motor 22; wherein, the power ratio of the motors 22 of each grinding component is 1:(1.8-2.2):(2.5-3.5); under this design, the rotation speed of the three grinding components can be controlled independently, and the rotation speed ratio can be adjusted to flexibly adjust the particle size of the produced grinding material and ensure a balance between quality and efficiency.

[0031] Although the present invention has been specifically shown and described in conjunction with preferred embodiments, those skilled in the art should understand that various changes in form and detail may be made to the present invention without departing from the spirit and scope of the present invention as defined in the appended claims, and all such changes shall be within the scope of protection of the present invention.

Claims

1. A grinding device for high-adhesion coatings, comprising a frame (100), wherein a grinding cylinder (1) is provided on the frame (100), the upper end of the grinding cylinder (1) is provided with a feed inlet (11), and the lower end is provided with a discharge outlet (12), characterized in that: The grinding cylinder (1) is inclined to the vertical direction. A feeding chamber (13) is formed in the grinding cylinder (1) on the side of the feeding port (11). A grinding mechanism (2) is arranged in the grinding cylinder (1). The grinding mechanism (2) includes a shaft assembly (21) mounted on the axis of the grinding cylinder (1), a motor (22) that drives the shaft assembly (21) to rotate, and at least two grinding components installed in sequence on the shaft assembly (21). Each grinding component includes a grinding rotor and a grinding stator fixedly installed on the inner wall of the grinding cylinder (1).

2. The grinding device for a high-adhesion coating according to claim 1, characterized in that: The grinding components consist of three groups: a coarse grinding component (23), a medium grinding component (24), and a fine grinding component (25). The grinding particle size of the three grinding components decreases sequentially from the feed inlet (11) side to the discharge outlet (12) side.

3. The grinding device for a high-adhesion coating according to claim 2, characterized in that: The grinding rotor of the coarse grinding assembly (23) is a blunt-tooth rotor, and the grinding stator is a grid stator (231) with a uniformly distributed grid on the surface.

4. The grinding device for a high-adhesion coating according to claim 2, characterized in that: The grinding rotor of the intermediate grinding assembly (24) is a sawtooth rotor with a sawtooth structure on its surface, and the grinding stator is a honeycomb stator (241) with a honeycomb structure evenly distributed on its surface.

5. The grinding apparatus for a high-adhesion coating according to claim 2, characterized in that: The grinding rotor of the fine grinding assembly (25) is a turbine rotor, and the grinding stator is a screen stator (251) with a mesh surface.

6. A grinding apparatus for a high-adhesion coating according to any one of claims 2-5, characterized in that: The power ratio of the motors (22) of each grinding component is 1:(1.8-2.2):(2.5-3.5).

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